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Khloe Kardashian still can't forget about Lamar Odom's alleged cheating while they were married, according to a report. Getty Images

Khloé Kardashian is still finding it difficult to cope with Lamar Odom’s alleged cheating during their marriage, according to a new report. The news comes as Kardashian faces criticism from several fans for dating another man while being with her estranged husband.

“[Khloé] loves Lamar and wants to see him pull through but she’ll never forget how he broke her heart,” an insider told Life and Style magazine. “That still haunts her every time she looks at him in his hospital bed."

The source reportedly said that the reality TV star has "forgiven" Odom, but "the pain is still there and it bothers her when people make comments about her relationships and don’t know the half [of it]."

Recently, Kardashian took a strong stand when a fan slammed her for failing to make up her mind between Odom and her boyfriend James Harden.

Kardashian told the Twitter user that the 36-year-old "went against all our vows," which, according to the source, was her way of standing up for herself. The "Keeping Up With the Kardashians" star has been caring for Odom since his hospitalization last month after an alleged drug overdose in a Nevada brothel.

Last week, while responding to another fan, Kardashian had said that their "divorce is still going forward."

“Khloé’s holding it together as best as she can,” the insider told Hollywood Life. “She’s sick as a dog and doing her best not to crack but is close to her breaking point...Caring for Lamar is a full time job and it’s one she chose to do knowing it would take everything out of her.”

“Khloé’s holding it together as best as she can,” another source told Hollywood Life. “She’s sick as a dog and doing her best not to crack but is close to her breaking point...Caring for Lamar is a full time job and it’s one she chose to do knowing it would take everything out of her.”

Meanwhile, Kardashian contracted a staph infection at the hospital where Odom is being treated.

"She is so frustrated by the fact that she was doing something good and then this happens," another source told People magazine. Kardashian had also said on Twitter Thursday that she was taking antibiotics and painkillers to cure the infection.

A second source told the magazine: "She just needs some medication and some rest and she will be fine. She's under a doctor's care and they are happy with how she is progressing."